Laurie's review Flashcards
Can torsades be cardioverted?
no defibrilated
What are the three requirements for reentry?
fast pathway
slow pathway
extra stimulus
What is life threatening with WPW?
A. fib
What is an indication for an ICD?
VT, VF
What is considered sustained VT?
> 30 seconds
What is the treatment for triggered VT (Torsades)?
Mg ++
What’s the survival rate for Sudden Cardiac Death?
20%
What does ICD stand for?
Implantable Cardioverter defibrillator
Where does automaticity happen and why?
phase 4
metabolic disturbances
electrolyte imbalances
What is a sensed refractory period?
The measure of time after an intrinsic impulse to inhibit shocking
What is a bin used for?
To measure the amount of intervals
What is the nominal amount of intervals in a bin?
12
What does HV stand for in ICDs?
High Voltage Shock
Everything in an ICD is programmed by what?
Rate
What does B stand for on pacing channel?
Bradycardia pacing
What does S stand for on pacing channel?
Sinus Rhythm
What happens when the bin is full?
Therapy is delivered
What does the stars or dots on the EGM represent?
battery charging
What is redetection?
After delivers therapy it reanalyzes the rhythm
Whats the difference between defibrillation and cardioversion?
Cardioversion is a lower number of joules
Describe the pulse width and voltage of the therapy
30-36J
10 - 20 ms
What is the max output of an ICD?
36J
What is the biggest unit in the ICD?
Capacitor
What does the capacitor due?
Stores the energy
What is reformation?
Periodically recharging the battery
What is ERI?
Elective Replacement Indicator
What are the two components of an ICD?
Capacitor
Battery
What is noncommited therapy?
The charge can be aborted if the rhythm is spontaneously converted to SR
What is non comited therapy?
The charge can be aborted if the rhythm is spontaneously converted to SR
True or False
Stored energy is always greater than delivered
True
What is biphasic pulse?
shocks from the can to the lead and back along the same vector
What is biphasic pulse?
shocks from the can to the lead and back along the same vector
What is the normal programmable vector for shocking?
classic Triade
What is ATP?
overdrive pacing
What is burst pacing?
a single series of sequential, rapid, paced, stimuli
What is ramp pacing?
Each stimuli in overdrive pacing is increased
What are the advantages of ATP?
no charge time
What is a normal EF?
55-65%
What is the normal O2 level in the LV?
95%
What is the first phase of Ventricular systole?
isovolumetric contraction
What is the dicrotic notch?
closure of the aortic valve
What is the normal O2 level in the RV?
65%
